Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dbad08ba8b3c444…

MALICIOUS

PDF

72.5 KB Created: 2021-02-05 23:27:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 990ef36a1756a03da4d615344c96259c SHA-1: c62806a276bf2834b6cf9ee4ba5e7c2d8adc7da2 SHA-256: 7dbad08ba8b3c444392a2653a0a3bdc9c6a56c22e2357c57f8d0a36ed9918045
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://crophysi.ru/123?utm_term=kenmore+elite+microwave+convection+oven+manual In PDF document text
    • https://mulunumidivopiz.weebly.com/uploads/1/3/5/3/135393794/vuzikifeli.pdfIn PDF document text
    • https://dafizigupiteg.weebly.com/uploads/1/3/4/4/134492389/wuzowize.pdfIn PDF document text
    • https://pigamudabuv.weebly.com/uploads/1/3/4/2/134235231/xufapurakirite.pdfIn PDF document text
    • https://namonivet.weebly.com/uploads/1/3/4/4/134493383/3662338.pdfIn PDF document text
    • https://cdn.sqhk.co/vefasebo/ieCxggx/time_traveler_s_wife_streaming_vostfr.pdfIn PDF document text
    • https://buvonumonub.weebly.com/uploads/1/3/5/3/135304713/1003710.pdfIn PDF document text
    • https://cdn.sqhk.co/mudonisogub/jsjc0hf/20288479713.pdfIn PDF document text
    • https://tuxipowu.weebly.com/uploads/1/3/4/6/134699968/rexadifuponogunufum.pdfIn PDF document text
    • https://sajakuzotile.weebly.com/uploads/1/3/1/0/131071181/zegofuza.pdfIn PDF document text
    • https://cdn.sqhk.co/mogizilo/epicqha/i_remember_you_skid_row_lyrics.pdfIn PDF document text
    • https://nefovevetovuj.weebly.com/uploads/1/3/5/3/135390951/ec55b6ecae20aa7.pdfIn PDF document text
    • https://voxivunesiru.weebly.com/uploads/1/3/1/4/131407918/jogetarixazopaf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rituruve.epizy.com/bevetomitifilalut.pdfIn PDF document text
    • http://rawozenagi.epizy.com/apx_pulsar_vaporizer_manual.pdfIn PDF document text
    • http://waraxiv.rf.gd/baal_veer_episode_1016.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF7B 4888 bytes
SHA-256: f4ae80bbfdaee641cbc85b60b9a4ed504a3f1884ab743cb20c604d8b9ae09e56
font_01_sfnt_off0000f01e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01E 10988 bytes
SHA-256: ae88d7d32289ebec8b21d885c4d9c7952a38477a0f316638862abbdd901c9805

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